A new configuration for erbium-doped fiber lasers in which two different connected fibers are used is studied: one is heavily and the other weakly doped. It is demonstrated that the dynamics of such a system depends on the fiber into which the pump is injected. The experimental results are interpreted in the framework of an ion-pair interaction model.
© 1996 Optical Society of America
S. Colin, E. Contesse, P. Le Boudec, G. Stephan, and F. Sanchez, "Evidence of a saturable-absorption effect in heavily erbium-doped fibers," Opt. Lett. 21, 1987-1989 (1996)